i dont understand how to do these qu,
1) limit x-> 7 (2x+3)/(x-7)
2) the function f(x)=(4x^2-9)/(2x-3) is not continuous throughout its domain. redefine f(x) such that it is continuous throughout its domain
3) limit x approaches infinity (x^3-2x^2+3x+4)/(3x+5)
4) limit x app infinity (sqrt...